Amazon.com : AquaBead GC Tek 9.0 Bead Filter AB9.0 - for Ponds to 25,000 Gallons and Fish Loads to 450 LBS : Pond Liners And Kits : Patio, Lawn & Garden
About AST: Innovators in Bead Filter Systems & Biological Filters
Evolution AquaK1 Micro Bead Filter 30 - Pond from Pond Planet Ltd UK
AquaForte Bead Filters for ponds and swim ponds
Evolution AquaK1 Micro Bead Filter 30 - Pond from Pond Planet Ltd UK